Reivindicaciones

1. Procedure for the obtaining of a titanonece compound with the following formula: <img class="EMIRef" id="584493295-ib0004" /> where: L, which can be equal or different one from the other, are cyclopentadiene, or pentamethylcyclopentadiene; R<1>, R<2>, R<3>, equal or different one from the other, are selected from the group consisting of: hydrogen, alkyl group of 1 to 4 carbon atoms and OR<4> , where R<4> is an alkyl group of 1 to 4 carbon atoms; at least one of the R<1>, R<2> or R<3> is hydrogen; characterised by the following steps: Preparation of the Grignard reagent by reaction of the magnesium metal with a compound with the formula (II): <img class="EMIRef" id="584493295-ib0005" /> where R<1>, R<2> and R<3> have already been defined and Br is bromine in a polar solvent; Reaction of the Grignard reagent in solution with titanocene dichloride, in a 2:1 ratio; Precipitation with a non-polar solvent, of the chlorobromomagnesium salts generated in the reaction medium and filtration of the same, obtaining a solution of the compound with the formula (I). 2. Procedure according to claim 1 characterised in that at least one L is cyclopentadiene. 3. Procedure according to claims 1-2 where the tianocene compound has the following formula (III): <img class="EMIRef" id="584493295-ib0006" /> where: L, equal or different one from the other, are cyclopentadienyl or pentamethylcyclopentadienyl; OR<4> is an alcoxy group containing from 1 to 4 carbon atoms. 4. Procedure according to claims 1-3, characterised in that solvents used in step a) are liquid with boiling points greater than or equal to 65°C. 5. Procedure according to claims 1-4, characterised in that solvent used in step a) is tetrahydrofuran. 6. Procedure according to claims 1-4, where the synthesised compound is bis(4-methoxy phenyl) bis(cyclopentadienyl) titanium.